1.	Simplify 1 Simplify the following expression: $$ -2 - 2 + 3 - -5 - {\left(-2 + -3\right)}^{2} $$ Correct Answer $$ -21$$ or -21.0000

2.	Simplify 2 Simplify the following expression: $$ 2\left(-1 - -4\right){\left((-3)(-2)\right)}^{\left(5 - -2\right)} $$ Correct Answer $$ 1679616$$ or 1679620

3.	Fractions 1 Simplify the following expression: $$ \frac{-3}{3} + \frac{3}{4} $$ Correct Answer $$ \frac{-1}{4}$$ or -0.25

4.	Fractions 2 Simplify the following expression: $$ \frac{\frac{-4}{2}}{\frac{4}{3}} $$ Correct Answer $$ \frac{-3}{2}$$ or -1.5

5.	Significant figures 1. Write the following to 3 significant figures: 0.0048530750 Correct Answer 0.00485 or $$4.85\times10^{-3}$$ 2. Write the following to 4 significant figures: 7.6283131 Correct Answer 7.628 or $$7.628\times10^{0}$$

6.	Standard Form 1. Write the following in standard form to 3 significant digits: 71.8852 Correct Answer $$7.19\times10^{1}$$ 2. Write the following in standard form to 3 significant digits: 164.759 Correct Answer $$1.65\times10^{2}$$

7.	Significant figures 1. Write the following in preferred standard form to 3 significant digits: 0.00025750 Correct Answer $$258\times10^{-6}$$ 2. Write the following in preferred standard form to 4 significant digits: 5679.0 Correct Answer $$5.679\times10^{3}$$

8.	Simplify 2 Simplify the following expression: $$ 2\times1(-4)\left(\frac{4}{3} + \frac{-3}{-5}\right) $$ Correct Answer $$ \frac{-232}{15}$$ or -15.4667

9.	Simplify 1 Simplify the following expression: $$ \left(-4 + -5\right)2\times2 - {\left(-2 + 4\right)}^{2} $$ Correct Answer $$ -40$$ or -40.0000

10.	Simplify 2 Simplify the following expression: $$ \frac{2{(-1)}^{-3}}{5\times5 + -1 - 2} $$ Correct Answer $$ \frac{-1}{11}$$ or -0.0909091